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CN-224205547-U - Photovoltaic module and photovoltaic system

CN224205547UCN 224205547 UCN224205547 UCN 224205547UCN-224205547-U

Abstract

The utility model provides a photovoltaic module and a photovoltaic system, and relates to the technical field of photovoltaics. The photovoltaic module comprises a photovoltaic laminated piece, a glass back plate, a glass cover plate, a back antireflection layer, a reflective film and a refractive index, wherein the photovoltaic laminated piece comprises a battery string array, the glass back plate is positioned on a first side of the battery string array, the glass cover plate is positioned on a second side of the battery string array, the back antireflection layer is arranged on a first surface of the glass back plate, which is far away from the battery string array, the reflective film is arranged on a second surface of the glass back plate, which is close to the battery string array, the thickness of the back antireflection layer is a, a is less than or equal to 100nm and less than or equal to 150nm, and the refractive index of the back antireflection layer is b, and b is more than or equal to 1.1 and less than or equal to 1.5. The utility model has gain for the front power generation power and the back power generation power of the photovoltaic module, thereby improving the power generation power of the photovoltaic module.

Inventors

  • XU LIQUN
  • LIU SHAOFENG
  • WANG YONGFENG

Assignees

  • 隆基绿能科技股份有限公司

Dates

Publication Date
20260505
Application Date
20250122

Claims (15)

  1. 1. A photovoltaic module is characterized by comprising a photovoltaic laminate; the photovoltaic laminate includes: The battery string array comprises a plurality of battery strings arranged in an array manner, wherein the battery strings comprise a plurality of battery pieces which are electrically connected; a glass back plate positioned on a first side of the battery string array; A glass cover plate positioned on a second side of the battery string array, the first side being opposite to the second side; The back antireflection layer is arranged on the first surface of the glass backboard far away from the battery string array; The reflective film is arranged on the second surface of the glass backboard, which is close to the battery string array; The thickness of the back antireflection layer is a, and the thickness of the back antireflection layer is more than or equal to 100nm and less than or equal to 150nm; the refractive index of the back antireflection layer is b, and b is more than or equal to 1.1 and less than or equal to 1.5.
  2. 2. The photovoltaic module of claim 1, wherein the photovoltaic module comprises, The thickness of the back antireflection layer is a, and the thickness of the back antireflection layer is 120 nm-140 nm; the refractive index of the back antireflection layer is b, and b is more than or equal to 1.2 and less than or equal to 1.4.
  3. 3. The photovoltaic module of claim 1, wherein the light reflective film comprises a support layer comprising opposite sides along the thickness of the photovoltaic laminate; The light reflecting layer is arranged on any one of the two sides of the supporting layer, or two light reflecting layers are respectively arranged on the two sides of the supporting layer, the light reflecting layer comprises an oriented reflecting structure layer and a metal reflecting layer attached to the oriented reflecting structure layer, and the oriented reflecting structure layer is closely adjacent to the supporting layer.
  4. 4. The photovoltaic module of claim 3, wherein the reflective patch comprises two reflective layers disposed on the two sides of the support layer, respectively; along the thickness direction of the photovoltaic laminated piece, the distance between the light reflecting film and the back anti-reflection layer is c, and c is more than or equal to 0.8mm and less than or equal to 2.5mm; the directional reflection structure layer comprises two side plates which extend from the supporting layer and are intersected, and an included angle of the two side plates is d and is more than or equal to 110 degrees and less than or equal to 130 degrees at the intersection position.
  5. 5. The photovoltaic module of claim 1, wherein the back side anti-reflection layer is rectangular in shape, the back side anti-reflection layer comprises a first side and a second side that intersect, the first side has a side length of x, the second side has a side length of y, and x is greater than or equal to y; Along the extending direction of the first edge, the size of the orthographic projection of the reflective film on the back antireflection layer accounts for the proportion of x to be e, and the proportion of e is more than or equal to 92% and less than or equal to 98%; and along the extending direction of the second edge, the size of the orthographic projection of the reflective film on the back antireflection layer accounts for f, and the proportion of the y is more than or equal to 95% and less than or equal to 98%.
  6. 6. The photovoltaic module of claim 1, further comprising a front anti-reflection layer on a side of the glass cover plate facing away from the array of cell strings; the thickness of the front anti-reflection layer is g, and g is less than or equal to a; the refractive index of the front anti-reflection layer is h which is more than or equal to 1.1 and less than or equal to 1.5.
  7. 7. The photovoltaic module of claim 3, wherein in the reflective patch, the two reflective layers are symmetrically disposed on the two sides of the support layer.
  8. 8. The photovoltaic module of claim 1, wherein the back side anti-reflection layer is rectangular in shape, the back side anti-reflection layer comprising intersecting first and second sides; The battery piece adjacent to the first side is a first battery piece, the side, perpendicular to the first side, of the first battery piece is a third side of the first battery piece, along the extending direction of the third side of the first battery piece, the proportion of the orthographic projection of the reflective adhesive film on the back antireflection layer, which covers the third side of the first battery piece, is i,1/3 is less than or equal to 2/3, and/or the battery piece adjacent to the second side is a second battery piece, the side, perpendicular to the second side, of the second battery piece is a fourth side of the second battery piece, and the proportion of the orthographic projection of the reflective adhesive film on the back antireflection layer, which covers the fourth side of the second battery piece, is k,1/3 is less than or equal to 2/3.
  9. 9. The photovoltaic module according to claim 1, wherein the back side anti-reflection layer is rectangular in shape, the back side anti-reflection layer comprises a first side and a second side which are intersected, the first side is x in length, the second side is y in length, x is greater than or equal to y, the shortest distance between the orthographic projection of the light-reflecting film on the back side anti-reflection layer and the first side in close proximity is m, the orthographic projection of the light-reflecting film on the back side anti-reflection layer and the second side in close proximity is n, and n is greater than or equal to m.
  10. 10. The photovoltaic module of any of claims 1 to 9, further comprising a plurality of bus bars positioned at a first end, a second end, and an intermediate portion of the photovoltaic module, the first end and the second end being at opposite ends of the photovoltaic module, the intermediate portion being positioned between the first end and the second end; and the front projection of the light-reflecting film on the back anti-reflection layer is not covered by the front projection of the bus bar on the back anti-reflection layer.
  11. 11. The photovoltaic module according to any of claims 1 to 9, wherein the light reflective film comprises an adhesive layer immediately adjacent to the glass backsheet, and/or, The reflective film comprises an insulating layer, wherein the insulating layer is positioned on one side, farthest from the glass backboard, of the reflective film.
  12. 12. The photovoltaic module of claim 11, wherein the photovoltaic module comprises, The thickness of the reflective film is r, r is more than or equal to 100 μm and less than or equal to 160 μm, and/or, The reflective film comprises a supporting layer, wherein the thickness of the supporting layer is t which is more than or equal to 20 mu m and less than or equal to 45 mu m, and/or, The thickness of the reflecting layer is w, w is more than or equal to 5 mu m and less than or equal to 15 mu m, and/or, The thickness of the adhesive layer is z, which is more than or equal to 60 mu m and less than or equal to 90 mu m, and/or, The thickness of the insulating layer is u, and u is more than or equal to 5 mu m and less than or equal to 15 mu m.
  13. 13. The photovoltaic module of claim 3, wherein the metal reflective layer comprises an aluminum layer.
  14. 14. The photovoltaic module of claim 3, wherein the support layer comprises a PET layer and the directionally reflective structural layer comprises a UV glue layer.
  15. 15. A photovoltaic system comprising a plurality of photovoltaic modules according to any one of claims 1 to 14 arranged in an array.

Description

Photovoltaic module and photovoltaic system Technical Field The utility model relates to the technical field of photovoltaics, in particular to a photovoltaic module and a photovoltaic system. Background The solar cell can convert solar energy into electric energy, and clean energy is utilized, so that the solar cell has wide application prospect. Because the voltage output by the single solar cell is low, and the unpackaged solar cells are easily affected by the environment, etc., a certain number of solar cells are usually formed into a photovoltaic module in a serial and parallel mode, so that the application scene of the photovoltaic module is enlarged. Photovoltaic modules typically include a battery sheet or the like. However, the conventional photovoltaic module has problems such as poor power generation. Disclosure of utility model The utility model provides a photovoltaic module and a photovoltaic system, and aims to solve the problem of poor power generation of the existing photovoltaic module. In a first aspect of the present utility model, there is provided a photovoltaic module comprising: A photovoltaic laminate; The photovoltaic laminate includes: the battery string array comprises a plurality of battery strings arranged in an array manner, wherein the battery strings comprise a plurality of battery pieces which are electrically connected; A glass back plate positioned on a first side of the battery string array; a glass cover plate positioned on a second side of the battery string array, the first side being opposite to the second side; the back antireflection layer is arranged on the first surface of the glass backboard far away from the battery string array; the reflective film is arranged on the second surface of the glass backboard, which is close to the battery string array; The thickness of the back antireflection layer is a, and the thickness of the back antireflection layer is more than or equal to 100nm and less than or equal to 150nm; The refractive index of the back antireflection layer is b, and b is more than or equal to 1.1 and less than or equal to 1.5. According to the photovoltaic module, the back anti-reflection layer arranged on the first surface of the glass back plate, which is far away from the battery string array, has a gain effect on back power generation of the photovoltaic module, and the second surface of the glass back plate, which is close to the battery string array, is provided with the reflection film, on one hand, the reflection film can radiate light from the photovoltaic laminate to the light side and reflect light transmitted from the gaps between the battery pieces to the back surface of the battery pieces, so that the gain effect on the back power generation of the photovoltaic module is achieved, on the other hand, the reflection film can radiate light from the photovoltaic laminate to the light side and reflect light transmitted from the gaps between the battery pieces to the glass cover plate, and then the light is reflected to the light-facing surface of the battery pieces by the glass cover plate, so that the gain effect on the front power generation power and the back power generation power of the photovoltaic module is achieved, and the gain effect on the front power generation power and the back power generation of the photovoltaic module are achieved. Meanwhile, through the mutual matching of the thickness of the back antireflection layer and the refractive index of the back antireflection layer, in the working process of the photovoltaic module, the back antireflection layer can transmit as much light reflected from the ground to the glass backboard, the glass backboard transmits the light to the battery piece, so that the light irradiated to the backlight surface of the battery piece is increased, the back power generation of the photovoltaic module has a gain effect, the back antireflection layer with the thickness and the refractive index is easy to obtain, the cost is relatively low, and the back antireflection layer is an optimal balance of multiple factors such as light transmission effect and cost. Meanwhile, in the photovoltaic module provided by the utility model, the back anti-reflection layer is arranged on the first surface of the glass backboard, the light reflecting film is arranged on the second surface of the glass backboard, and compared with the structure that the back anti-reflection layer is arranged on the first surface of the glass backboard and the glaze layer is arranged on the second surface of the glass backboard, the back anti-reflection layer and the light reflecting film are arranged on the two sides of the glass backboard, so that the photovoltaic module is compatible with the existing process, the existing process is easy to realize, and the two aspects basically have no adverse effect on the subsequent toughening process. Optionally, the thickness of the back antireflection layer is a, and the thickness of the b